DCM Sistemes BKL2518A Area Backlight

Wavelength choice is the most consequential decision with this fixture, and DCM offers the BKL2518A in Blue 470 nm, Green 525 nm, Red 630 nm, IR 850 nm, White (W00) and an RGB variant. For pure silhouette and gauging tasks the colour matters less than the contrast it produces, but shorter wavelengths such as Blue 470 nm diffract less around fine edges and tend to give the crispest outline on small features, while Red 630 nm and IR 850 nm penetrate certain translucent plastics and can suppress nuisance surface detail. Pairing the backlight wavelength with a matched bandpass filter on the lens is the standard way to reject ambient light and lock in the contrast the panel delivers. Electrically the fixture is simple: it runs on 24 VDC (+/-3%) through a 2-pin male chassis connector (PIN1 +24V, PIN2 0V), and in continuous (Type C) operation it needs no controller at all, drawing roughly 19-28 W depending on the colour ordered. That makes a continuous unit close to plug-and-play on a standard 24 V machine supply.

The BKL2518A also supports strobed (Type S) operation, which is where it earns its place on a moving or indexing line. In strobe mode a DCM strobe controller pulses the panel in sync with the camera trigger, pushing far higher instantaneous output, peaking up to roughly 317 W, so a short exposure can freeze motion while still flooding the field with light. This is the configuration to specify when parts pass continuously and you need to arrest blur, or when you want to overdrive brightness beyond the continuous rating without exceeding the panel's thermal limits. Environmentally the standard build is rated IP40, which is adequate for clean, dry enclosures but not for washdown or heavy particulate areas; an optional IP65 modifier is available where splash or dust protection is required. The fixture operates from 0 to 40 C, so it expects a reasonably controlled ambient and is not intended for hot ovens or freezer lines without accommodation. Taken together, the specs describe a mid-format, thin, metal-bodied backlight that is a deliberate, contrast-first tool for measurement and presence verification rather than a general-purpose floodlight.